Method of treating waste water

Patent · 01 January 1995

OSTI ID:869698

Deininger, James P ^[1]; Chatfield, Linda K ^[1]

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1. Colorado Springs, CO

A process of treating water to remove metal ion contaminants contained therein, said metal ion contaminants selected from the group consisting of metals in Groups 8, 1b, 2b, 4a, 5a, or 6a of the periodic table, lanthanide metals, and actinide metals including transuranic element metals, by adjusting the pH of a metal ion contaminant-containing water source to within the range of about 6.5 to about 14.0, admixing the water source with a mixture of an alkali or alkaline earth ferrate and a water soluble salt, e.g., a zirconium salt, in an amount sufficient to form a precipitate within the water source, the amount the mixture of ferrate and water soluble salt effective to reduce the metal ion contaminant concentration in the water source, permitting the precipitate in the admixture to separate and thereby yield a supernatant liquid having a reduced metal ion contaminant concentration, and separating the supernatant liquid having the reduced metal ion contaminant concentration from the admixture is provided. A composition of matter including an alkali or alkaline earth ferrate and a water soluble salt, e.g., a zirconium salt, is also provided.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5380443
• OSTI ID: 869698
• Country of Publication: United States
• Language: English

Related Subjects

/210/423/
14
1b
2b
4a
5a
6a
actinide
actinide metal
actinide metals
adjusting
admixing
admixture
alkali
alkaline
alkaline earth
amount
amount sufficient
composition
concentration
consisting
contained
contained therein
containing water
contaminant
contaminant-containing
contaminants
contaminants contained
earth
effective
element
ferrate
form
including
lanthanide
lanthanide metal
lanthanide metals
liquid
matter
matter including
metal
metals
metals including
method
mixture
periodic
periodic table
permitting
ph
precipitate
process
provided
range
reduce
reduced
reduced metal
remove
remove metal
salt
selected
separate
separating
soluble
soluble salt
source
sufficient
supernatant
supernatant liquid
table
therein
transuranic
transuranic element
treating
treating waste
treating water
waste
waste water
water
water soluble
water source
yield
zirconium